Promachus (Ancient Greek: Πρόμαχος, died 324 BC) was a common soldier in Alexander's army.
According to Plutarch, citing Chares of Mytilene, Promachus drank the equivalent of 13 litres of unmixed wine in 324 BC at Susa, when a drinking contest was held in connection with the funeral of Indian philosopher Calanus.
He won the first prize of a golden crown worth a talent and died three days later.
Forty-one other contestants allegedly died of alcohol poisoning as well.
This ancient Greek biographical article is a stub.